NAME

srec_dec_binary - DEC Binary (XXDP) file format

DESCRIPTION

The DEC Binary (XXDP) format was used on the PDP 11 series machines.
This is a binary format, and is not readable or editable with a text
editor. The file consists of records of the form
+-----+--------+---------+------------+----------+
|type | length | address | ...data... | checksum |
The field are-defined-as-follows:---+------------+----------+
type Two byte little-endian value. Must always be 1.
length Two byte little-endian value. This is the number of bytes in
the data, plus six.
address Two byte little-endian value. This is the load address of the
data.
data The data is simple raw bytes. There are (length-6) of them.
checksum
The checcksum is a single byte. It is the negative of the
simple summ of all the header and data bytes.
If the record length is exactly 6 (i.e. no data), this is the execution
start address record, indicating the transfer address.
In addition there may be NUL padding characters between records. It is
common for records to be padded so that they start on even byte
boundaries. In the days of paper tape, it was common for the file to
have many leading NULs, to generate blank leader on the tape.
SizeMultiplier
In general, raw binary data will expand in sized by approximately 1.03
times when represented with this format.

COPYRIGHT

srec_cat version 1.52
Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
2007, 2008, 2009 Peter Miller
The srec_cat program comes with ABSOLUTELY NO WARRANTY; for details use
the ’srec_cat-VERSionLicense’ command. This is free software and you
are welcome to redistribute it under certain conditions; for details
use the ’srec_cat-VERSionLicense’ command.